How to stop flip action reversing offsets in dynamic block

[jamami]

I have developed the attached dynamic block which positions nested blocks according to the distance value set in a block properties table.

To avoid text mirroring of the nested block labels I have used attributes and added a flip action.

This all works well until I try and change the length after a flip.  It appears the xpos value in the block properties table is applied as positive despite the flip state.

I have tried changing the point parameters to stretch parameters but have similar problems, especially when rotating the assembly to different angles.

 

I was hoping something as simple as adding a formulae into the block properties table ie dist*flipstate would work but there doesn't seem to be anyway to do this.

 

Is there a way to solve this?

 

 

 

jam3.dwg